Will my clamp-on rack damage my seatpost?

[tyler_s]

A co-worker gave me his old road bike (Trek 2300 circa early '90s) and I'm going to use it as a commuter. He installed a RockShox seatpost and I have no reason to change it (or do I...do these seatposts affect pedaling in any way?). I wonder, however, if it is compatable with my clamp-on rear rack (you know...the ones with the quick release skewers)?

Here is a pic of the seatpost:
http://www.seboe.com/seatpost.jpg

And the Rack:
http://www.seboe.com/rack.jpg

To be honest, I've never trusted these type of racks but I used it for years with my Gary Fisher Mt. Tam (stock seatpost) with no difficulties. I'm just not sure if the RockShox seatpost is as sturdy or if clamping it would affect the movement of the seat in any way. I'm not even sure if the main tube on the seatpost (the sationary one with the decal) is aluminum or steel.

The bike is supposedly a racing bike (it's geared like one) but it has threads to accept a "normal" bolt-on rack (why would a racer need a rack?) so I could just buy a different rack but I like the idea of easy removal in case I want to just get out and spin. Incidentally, this is the first road bike I've owned since my '90-'91 Trek 1200 was stolen seven years ago. I was basically given my old bike back!

Any help is greatly appreciated.

[Scotty_Dog]

I'm not quite sure, but isn't that a suspension seatpost?

If so, it does soak up some of your power transfer to the pedals. Determine which is more important to you - the speed of a standard seatpost or the comfort of a suspension seatpost.

To answer your question, I see no reason why you could not attach the rack to the stationary portion of that seatpost. As a matter of fact, it is probably built stronger than a standard seatpost to handle the forces seen under load.

[tyler_s]

isn't that a suspension seatpost?
sorry...yes, it is a suspension seat post. i kinda like it.

it is probably built stronger than a standard seatpost to handle the forces seen under load
quite possibly. i think i'll buy a standard rack and use the eyelets anyways if only because i can carry more weight and the load will be more stable/secure. thanks for the reply.